out of the nine gods which one is the most anti vampire/undead. i am using a imperial knight and was thinking of finding out which god would be the best for a imperial knight to serve also i plan on buying a house so he can be near the temple of the god

Of that Aedra that would be Akray. As the god of the dead, he is the enemy of all undead. Of the Daedra, you want Meridia, who has a serious hate-on for the undead.

Even though she is a Daedric Prince, I would go with Meridia since she HATES anything undead.